# 2019 Challenger de Buenos Aires – Singles

Pablo Andújar was the defending champion but chose not to defend his title.
Sumit Nagal won the title after defeating Facundo Bagnis 6–4, 6–2 in the final.

## Seeds

All seeds receive a bye into the second round.
* Federico Delbonis (second round)
* Hugo Dellien (second round)
* Leonardo Mayer (semifinals)
* Thiago Monteiro (semifinals)
* Guido Andreozzi (third round)
* Federico Coria (second round)
* Sumit Nagal (champion)
* Facundo Bagnis (final)
* Facundo Mena (second round)
* João Menezes (second round)
* Andrea Collarini (quarterfinals)
* José Hernández-Fernández (third round)
* Francisco Cerúndolo (quarterfinals)
* Renzo Olivo (second round)
* Matías Franco Descotte (second round)
* Thiago Seyboth Wild (third round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Agustín Velotti | 3 | 6$^1$ | | | | | | | | | | |
| 8 | Facundo Bagnis | 6 | 7$^7$ | | | | | | | | | | |
| 8 | Facundo Bagnis | 6 | 7$^7$ | | 8 | Facundo Bagnis | 6 | 3 | 6 | | | | |
| | | | | | 3 | Leonardo Mayer | 2 | 6 | 3 | | | | |
| 3 | Leonardo Mayer | 6 | 6$^3$ | 7$^7$ | 3 | Leonardo Mayer | 2 | 6 | 3 | | | | |
| | Juan Pablo Ficovich | 1 | 7$^7$ | 6$^5$ | | | | | | | | | |
| | Juan Pablo Ficovich | 1 | 7$^7$ | 6$^5$ | | | | | | 8 | Facundo Bagnis | 4 | 2 |
| | | | | | | | | | | 7 | Sumit Nagal | 6 | 6 |
| 11 | Andrea Collarini | 6 | 1 | 5 | | | | | | | | | | 7 | Sumit Nagal | 6 | 6 |
| 4 | Thiago Monteiro | 3 | 6 | 7 | | | | | | | | | |
| 4 | Thiago Monteiro | 3 | 6 | 7 | 4 | Thiago Monteiro | 0 | 1 | | | | | |
| | | | | | 7 | Sumit Nagal | 6 | 6 | | | | | |
| 7 | Sumit Nagal | 6 | 4 | 6 | 7 | Sumit Nagal | 6 | 6 | | | | | |
| 13 | Francisco Cerúndolo | 3 | 6 | 4 | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 1 | F Delbonis | 4 | 3 | | | | | | | | | |
| | Maximiliano Estévez | 0 | 2 | | A Velotti | 6 | 6 | | | | | | | | | |
| | A Velotti | 6 | 6 | | | | | | A Velotti | 7$^8$ | 1 | 6 | | | | |
| | N Álvarez | 6 | 6 | | | | | 16 | T Seyboth Wild | 6$^6$ | 6 | 3 | | | | |
| WC | JM Cerúndolo | 3 | 0 | | N Álvarez | 4 | 4 | | | | | | | | | |
| | | | | 16 | T Seyboth Wild | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | A Velotti | 3 | 6$^1$ |
| | | | | | | | | | | | | | 8 | F Bagnis | 6 | 7$^7$ |
| | | | | 9 | F Mena | 6$^0$ | 2 | | | | | | | | | |
| | G Elias | 4 | 0$^r$ | | F Meligeni Alves | 7$^7$ | 6 | | | | | | | | | |
| | F Meligeni Alves | 6 | 3 | | | | | | F Meligeni Alves | 4 | 1 | | | | | |
| | Bastián Malla | 6$^{10}$ | 4 | | | | | 8 | F Bagnis | 6 | 6 | | | | | |
| | M Cuevas | 7$^{12}$ | 6 | | M Cuevas | 4 | 2 | | | | | | | | | |
| | | | | 8 | F Bagnis | 6 | 6 | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 3 | L Mayer | 7 | 6 | | | | | | | | | | |
| Q | F Zeballos | 6 | 6 | | Q | F Zeballos | 5 | 1 | | | | | | | | | | |
| | G Villanueva | 4 | 1 | | | | | | | 3 | L Mayer | 7$^{10}$ | 6 | | | | | |
| | M Kestelboim | 3 | 7 | 5 | | | | | | WC | F Díaz Acosta | 6$^8$ | 3 | | | | | |
| WC | F Díaz Acosta | 6 | 5 | 7 | WC | F Díaz Acosta | 7 | 4 | 6 | | | | | | | | | |
| | | | | | 14 | R Olivo | 5 | 6 | 2 | | | | | | | | | |
| | | | | | | | | | | | | | | 3 | L Mayer | 6 | 6$^3$ | 7$^7$ |
| | | | | | | | | | | | | | | | JP Ficovich | 1 | 7$^7$ | 6$^5$ |
| | | | | | 10 | J Menezes | 6 | 5 | 5 | | | | | | | | | |
| | O Luz | 2 | 6$^6$ | | | JP Ficovich | 2 | 7 | 7 | | | | | | | | | |
| | JP Ficovich | 6 | 7$^8$ | | | | | | | | JP Ficovich | 7 | 6 | | | | | |
| | Matías Zukas | 6 | 6$^5$ | 2 | | | | | | | C Ugo Carabelli | 5 | 4 | | | | | |
| | C Ugo Carabelli | 4 | 7$^7$ | 6 | | C Ugo Carabelli | 6 | 6 | | | | | | | | | | |
| | | | | | 6 | F Coria | 4 | 4 | | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 5 | G Andreozzi | 7$^9$ | 2 | 6 | | | | | | | | | |
| | GA Olivieri | 6 | 6 | | GA Olivieri | 6$^7$ | 6 | 3 | | | | | | | | | |
| | Oscar José Gutierrez | 4 | 4 | | | | | | 5 | G Andreozzi | 4 | 4 | | | | | |
| | Jordan Correia | 2 | 0 | | | | | | 11 | A Collarini | 6 | 6 | | | | | |
| | P Toledo Bagué | 6 | 6 | | P Toledo Bagué | 4 | 5 | | | | | | | | | | |
| | | | | 11 | A Collarini | 6 | 7 | | | | | | | | | | |
| | | | | | | | | | | | | | 11 | A Collarini | 6 | 1 | 5 |
| | | | | | | | | | | | | | 4 | T Monteiro | 3 | 6 | 7 |
| | | | | 15 | MF Descotte | 4 | 4 | | | | | | | | | | |
| WC | RA Burruchaga | 4 | 2 | | C Lindell | 6 | 6 | | | | | | | | | | |
| | C Lindell | 6 | 6 | | | | | | | C Lindell | 6$^6$ | 6$^4$ | | | | | |
| WC | TA Tirante | 6 | 7 | | | | | | 4 | T Monteiro | 7$^8$ | 7$^7$ | | | | | |
| Alt | R Matos | 4 | 5 | WC | TA Tirante | 1 | 2 | | | | | | | | | | |
| | | | | 4 | T Monteiro | 6 | 6 | | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 7 | S Nagal | 6$^2$ | 6 | 6 | | | | | | | | | | |
| WC | S Báez | 7$^7$ | 2 | 6$^3$ | | P Sakamoto | 7$^7$ | 4 | 3 | | | | | | | | | | |
| | P Sakamoto | 6$^5$ | 6 | 7$^7$ | | | | | | 7 | S Nagal | 6 | 3 | 6 | | | | | |
| | G Clezar | 1 | 3 | | | | | | | 12 | J Hernández-Fernández | 3 | 6 | 4 | | | | | |
| | H Casanova | 6 | 6 | | | H Casanova | 5 | 2 | | | | | | | | | | | |
| | | | | | 12 | J Hernández-Fernández | 7 | 6 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 7 | S Nagal | 6 | 4 | 6 |
| | | | | | | | | | | | | | | | 13 | F Cerúndolo | 3 | 6 | 4 |
| | | | | | 13 | F Cerúndolo | 6 | 6 | | | | | | | | | | | |
| | TM Etcheverry | 3 | 6$^{11}$ | | | M Hamou | 2 | 1 | | | | | | | | | | | |
| | M Hamou | 6 | 7$^{13}$ | | | | | | | 13 | F Cerúndolo | 7$^7$ | 6 | | | | | | |
| | JP Varillas | 6 | 6 | | | | | | | | JP Varillas | 6$^3$ | 3 | | | | | | |
| Q | Tomás Farjat | 2 | 3 | | | JP Varillas | 6 | 6 | | | | | | | | | | | |
| | | | | | 2 | H Dellien | 4 | 2 | | | | | | | | | | | |